Prognosis
Some Pfizer Doses Returned After Getting Too Cold
- Two trays each held back in California and Alabama, Perna says
- Vials returned to Pfizer to determine if still safe, effective
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Some of the first doses of the Pfizer Inc.-BioNTech SE Covid-19 vaccine were held up from delivery in the U.S. this week and sent back to the company because they were colder than anticipated.
Gustave Perna, the army general who serves as Operation Warp Speed’s chief operations officer, said that two trays of vials at two California locations was colder than they are supposed to be. The same thing happened at one location in Alabama, Perna said at a news briefing Wednesday.